Aspirator.



No. 657,440. Patented Sept 4, |900.

' W. J. McCAW.

' ASPIRATOB.

(Application meu July 2, 1900.; (No Model.)

` UNETED STATES PATENT OFFICE.

WILLIAM J. MCOAW, OF PROVIDENCE, RHODE ISLAND.

As Pl RATO R.

SPECIFICATION forming` part of Letters Patent No. 657,440, dated September 4, 1900. Application tied my 2,1900. serai No. 22,322.. (No man.)

Be it known that I, WILLIAM J. MCOAW, a citizen of the United States, residing at P-rovidence, in the county of Providence andState of Rhode Island, have invented certain new and useful Improvements in Aspirators, of

which the following is a specification, refer#`^ ence being had therein to the accompanying drawing, which is a central longitudinal section of said invention.

My invention relates to that class of sur? gical instruments known as aspirators and used to draw from the human body eifused `and purulent liquids or fluids which are Vthe result of disease.

My invention consists inthe novel coni struction and combination of the several elements hereinafter particularly described, and specifically set forth in the claim.

In the drawing, A represents a tube or barbeveled end, as shown at m, and holes n -rel, preferably made of glass, in order that' the contents of the same may be readily seen. At each end of said tube is an annulus or ring, preferably made of hard india-rubber, vulcanized or otherwise secured to thetube A and provided with exterior screw-threads, asseen at u and b.

B is a headpiece having a central aperture through it and made with a concentric chamber c in its lower part, which chamber has a passage or bore extending therefrom through one side and furnished with an interior screwthread. Insaid passage or bore, which eX- tends from the chamber c, is fitted a curved discharge-pipe O by means of screw-threads thereon, as shown.` The discharge-pipe() at its outer end is enlarged and has an interior valve-seat d, with a central opening therein, and also a screw-bridge e, and in the space between said seat d and bridge e` is placed a ball D; A centrally-bored coupling-piece E fits into the open end of the discharge-pipe O, and on said piece'E is a knob ftoeallow the rubber pipe F tobe secured thereon.

The headpiece B has a central `concentric neck g,whose exterior surface is screw-thread ed. Acentrally-bored cap G, screw-threaded on its inner surfaces, fits upon the ne'ck g ofV the headpiece B. A packing-ring h, of felt or other suitable material, is held by the cap G' upon the. top edge of the neck g of the headpiece B.

3 cant. the flanged collars or rings p p', screw-thread- Upon the lower end of the tube A and lit;r I

tingby means of screw-threads, as shown,'is

the end piece H, having a central concentric and screw-threaded bore. In said bore is scoured a valve-block I, with a central aperture through it and provided with a valve-seat vl and having a screw-bridge]- secured therein.

In the space between the seat i and bridge j is a ball J. A coupling-piece K, having a knob lc and centrally bored, fits into the lower open end of the valve-block I, and a rubber pipe L fits on said 'coupling-piece. A glass tube M connects two sections L L of the rubber pipe and enables the operator to see the character of the liquid flowing through the pipe. Y

N is a coupling-piece, centrally bored and furnished with aknob l, upon which the end of the rubber tube L" is secured.

O is a hollow needle having a sharp open through its sides. This needle is held and secured in a thimble o, into whose open end the end of the coupling-piece N is inserted.

` In the tube or barrel A a piston is movable, which is made, preferably, in two part-s P P',

`of leather or other suitable material, which is kkept soft with oil, vaseline, or other lubri- These parts P P' are held together by Vsecured to the upper part of the sleeve or tube Q. Said rod S has an interior block or partitiont and just below the same an orifice or opening u. The piston-rod S passes through the central apertures of the headpiece B and cap` G and through the packing-ring h. A

. handle T is secured upon the outer end of the piston-rod S.

In operating with this instrument the needle O is thrust into the sac or cavity in the body which is to be drained, and the pistonrod S is drawn out by the handle T, thereby IOO ' 2f i i i y 6457,44@v

liquid passes into the tube or barrel A belowy the piston P. .When the piston-rods is moved in the reverse direction by pushing the handleT inwardly, the suction caused thereby in the upper part of the tube orbarrel A above the piston P draws the ballwalre. D into its seat d inthe pipe C. As the piston. P P descends `the fluid contents of` the tube -or barrel- Abelow the piston P-- pase npthrough the sleeve or tube Q, lifting the value R from its seat, and, enter thelower end of.

. `Lon P.

tom. of the tube or barrel A and the diseased per portionof Said tube orbarrel A are 'lift-Y D to'be unseated) and thenthrough the rub"-VV `ber tube F into a pail or other receptacle:

of the hole u ofvsaid rod and into the upper portion of the tube or barrel AabQYethe pis: 'Phe-pistoniD P is then at the bot-l fluids are inV ,said tube, but above the. pistoni New when the piston-rod S next is drawn up by the handle T the fluid contents of `the up,-

ed 4up by the piston and flow out through the..

chamber `c in the headpieo, B and through the discharge-pipe C (causing the lball-valve While the rising `piston is thusemptying-the upper portion of thetubeor barrel A,litis by its, suction drawing more of the fluid orf matter into the lower portion of said tube or barrel beneath the piston through the needle lO and pipe L L', as. before described...y i The operation is continued as long as isnecessary. By `means of the packing-ring h; the-reis a. tight connection between the neck grof4 the hefadpiece B andthe cap G, thus preventing Yany escape ofthe fluid contents up through' the central aperture of said cap, where the any drawing back of iheuidnthrough the pipes E Owhen a` suction is created in the upper portion of the tube orbarrel A by the kdescent of .the piston-rod and piston.

I' claim 'as` a novel'and useful invent-ion and ydesire to secure by Letters Patent- The. improved aspirator herein described,

consisting of the combination of a tubular lbarrel having a centrally-bored headpiece -lar barrel atits'opposite end, a centrallyperforated cap fitting on said headp'iece,

@a centrally perforated. packing'. heldV between `,raid can andheadpieoe, a piston in` "said tubular barrel with ajsleeve oriub'e Y l passing centrally thmughitge'valve and a the hollow piston-rod S, thence owingout valversear. in rsaid sleeve or tube,A a. piston-,rod attached to said piston and passing-through the cent1-albores of said headpeceand .cap yand having its lowerend hollow andopening into 'said sleeve or tilbeandprovidedwith an aperture through one side thereof, Va handle charge-pipe fitting in the side, passage of the head piece, a va1ve+seat insaid dischargefpipe Send, wvalve therein, `arubber" tube with e couplingfpiececon necting it to said dischargepipe, arubber tubeand a cc'Jupling-piece connecting it tosaid valve-block, e hollow needle. `with holes in its, sides, a thimble in o vwhich said needle is mounted and a couplingpiece r`connectinp,r the thiinble to the last.-

. named rubber tubes ubvstantially as speoified. o In testimony whereof I afixmy signature in Ypresence of two witnesses.

o, WILLIAM MecAW. Wit,nemesiv l e f ANNIE E.,PERCE, o'

piston-rod moves, and the valveD prevents j WARREN, R. PERGE. 

